20738425 has 6 divisors (see below), whose sum is σ = 25715678. Its totient is φ = 16590720.

The previous prime is 20738407. The next prime is 20738447. The reversal of 20738425 is 52483702.

It can be written as a sum of positive squares in 3 ways, for example, as 5143824 + 15594601 = 2268^2 + 3949^2 .

It is not a de Polignac number, because 20738425 - 2¹³ = 20730233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 414744 + ... + 414793.

Almost surely, 2^20738425 is an apocalyptic number.

20738425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20738425 is a deficient number, since it is larger than the sum of its proper divisors (4977253).

20738425 is an equidigital number, since it uses as much as digits as its factorization.

20738425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829547 (or 829542 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20738425 is about 4553.9460910292. The cubic root of 20738425 is about 274.7421274097.

The spelling of 20738425 in words is "twenty million, seven hundred thirty-eight thousand, four hundred twenty-five".